Sumnacon Suction Cup Bath Hook Holder, Stainless Steel Sucker Bathroom Towel Hook, Coat Hook, Single Robe Hook for Bedrooms, Bathrooms and Closets Suction cup only works on even surface, such as glass, polished tiles or even stainless steel surface. Constructed of stainless steel ensuring durability and dependability Stylish and Modern Design,Brushed stainless steel finish. SUS304 Stainless Steel, will not rust Strong suction cup to prevent slipping